Knowledge of flight principles and aerodynamics

The principle of aerodynamics is: air is power, it is also the medium of power, and it is also the obstacle of power.

Aerodynamics is a branch of mechanics that studies the mechanical characteristics of aircraft or other objects in relation to air or other gases, the flow laws of gases, and the accompanying physicochemical changes. It is a discipline that has grown up on the basis of fluid mechanics with the development of the aviation industry and jet propulsion technology.

Aerodynamic range of applications:

1. In low-speed aerodynamics, the medium density changes very little, which can be regarded as constants, and the basic theories used are inviscid two-dimensional and three-dimensional geopotential flow, airfoil theory, lift line theory, lift surface theory and low-speed boundary layer theory. For subsonic flow, the viscous potential flow obeys a nonlinear elliptical partial differential equation.

2. In supersonic flow, the basic research contents are compression wave, expansion wave, shock wave, Plante Meyer flow (the basic relationship model between compression wave and expansion wave and its function model), cone flow, and so on. The main theoretical processing methods include supersonic small perturbation theory, eigenline method and high-speed boundary layer theory.

The principles of aerodynamics and flight are as follows:

Aerodynamics is a branch of fluid mechanics, which is a discipline that studies the laws of motion of air or other gases, the interaction between air or other gases and aircraft or other objects when they are in relative motion, and the accompanying physical and chemical changes.

The specific fold is as follows:

1.Fold the paper in half onto the center line.

2.Then fold one side of the polyline in the middle of the pair to the center line.

3.Fold the left and right corners in half toward the center point and open the corners.

4.Fold the middle in half to the corners.

5.Then fold the centerline position, the front side, and the back side in half to the centerline.

6.Pull out the front ends of both sides, two and the faces are basically symmetrical, and fold them in half about two centimeters upwards.

7.Fold the back end of one side of it in half again.

8.Hold it with left forceps and wrap the right part around the left part.

9.Finally, fold the back end of the right part in half again.

Once you've completed the above steps, you'll have created a super complex, stable flying paper airplane.

First of all, the right center of gravity is the key to achieving the flight of paper airplanes. When origami, it is necessary to consider whether the weight is evenly distributed, especially in the front. When flying, the paper airplane needs to fly smoothly, which requires the center of gravity to be properly balanced.

Secondly, aerodynamics is also an important principle of paper airplane flight. The fan-shaped side sections of paper airplanes cause air movement, as well as twisting and warping. Twisting and cocking increases the lift of the air on the paper airplane, as well as stability, allowing it to maintain its posture in flight.

In addition, the airflow caused by the speed also assists in the flight, creating lift and allowing the paper airplane to fly farther.

Equally important is the aerodynamic stability. When flying, if the paper airplane is unstable, it is likely to lose its balance, shake or collapse directly and fall. Therefore, stability is the key to ensuring a smooth flight of paper airplanes.

Paper airplanes can adjust their aerodynamic performance by changing the sector side section, adjusting the center of gravity and the inner curve of the main wing, etc., and beginners can start with a simple straight take-off and gradually master these flight principles.

Principles of aerodynamics: kinematics follows the law of conservation of mass and follows Newton's second law, the conversion and transfer of energy follows the law of conservation of energy, and thermodynamics follows the first and second laws of thermodynamics.

Aerodynamics is a branch of mechanics, which is the study of the force characteristics of aircraft or other objects in the case of relative motion of air or other gases, the flow law of gases and the accompanying physical and chemical changes.

In this sense, there are two classifications of aerodynamics, one is according to the speed range of fluid motion or the flight speed of the aircraft, aerodynamics can be divided into low-speed aerodynamics and high-speed aerodynamics, in low-speed aerodynamics, the gaseous medium can be regarded as incompressible, and the corresponding flow is called incompressible flow, and the flow greater than this speed must consider the compressibility effect of the gas and the change in the thermodynamic properties of the gas, and the flow corresponding to high-speed aerodynamics is called compressible flow, The other is according to whether the viscosity of the gas medium must be considered in the flow, and aerodynamics can be divided into ideal aerodynamics and viscous aerodynamics.